<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-alert title="注意：只允许为三级分类设置相关参数！" type="warning" :closable="false" show-icon></el-alert>
            <el-row class="cat_opt">
                <el-col>
                    <span>选择商品分类</span>
                     <el-cascader v-model="selectedCateKeys" :options="catelist"  expand-trigger ='hover' :props="cateProps"   @change="handleChange" clearable change-on-select></el-cascader>
                </el-col>
                <el-col></el-col>
            </el-row>
            <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <el-tab-pane label="动态参数" name="many">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" 
                    @click="addDialogVisible =true">添加参数</el-button>
                    <el-table :data="manyTableData" border stripe>
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                                <!-- 输入文本框 -->
                                <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)" >
                                </el-input>
                                <!-- 添加按钮 -->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>

                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="参数名称" prop='attr_name'></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                               <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                               <el-button type="danger" size="mini"  icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
                <el-tab-pane label="静态属性" name="only">
                    <el-button  type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性</el-button>
                     <el-table :data="onlyTableData" border stripe>
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                                <!-- 输入文本框 -->
                                <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)" >
                                </el-input>
                                <!-- 添加按钮 -->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="属性名称" prop='attr_name'></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                               <el-button type="primary" size="mini" v-model="scope.row" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                               <el-button type="danger" size="mini"  icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
            </el-tabs>
        </el-card>
        <!-- 添加参数对话框 -->
        <el-dialog :title="'添加'+ titleText" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
        <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
        </el-dialog>
    <!-- 修改参数对话框 -->
        <el-dialog :title="'修改'+ titleText" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="editForm.attr_name"></el-input>
            </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
            catelist :[],
            cateProps: {
                value : 'cat_id',
                label: 'cat_name',
                children : 'children'
            },
            selectedCateKeys : [],
            activeName :'many',
            manyTableData : [],
            onlyTableData : [],
            addDialogVisible : false,
            addForm :{
                attr_name :''
            },
            addFormRules : {
                attr_name :[{required :true,message:'请输入参数名称',trigger : 'blur'}
                ]
            },
            editDialogVisible : false,
            editForm :{},
            editFormRules: {
                 attr_name :[{required :true,message:'请输入参数名称',trigger : 'blur'}
                ]
            }

        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        async getCateList(){
          const{data : res} =  await this.$http.get('categories')
          if(res.meta.status !== 200){
              return this.$message.error('获取商品分类失败')             
          }
          this.catelist = res.data
          console.log(this.catelist)
        },
        handleChange(){
           this.getParamsData()
        },
        handleTabClick(){
            console.log(this.activeName)
            this.getParamsData()
        },
        async getParamsData(){
             console.log(this.selectedCateKeys)
          if ( this.selectedCateKeys.length !== 3){
              this.selectedCateKeys = []
              return
          }

          console.log(this.selectedCateKeys)
          const{data : res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params : {sel : this.activeName}})
          if(res.meta.status !== 200){
              return this.$message.error('获取参数失败')
          }
          res.data.forEach(item => {
              item.attr_vals = item.attr_vals ?
             item.attr_vals.split(',') :[]
             item.inputVisible = false
             item.inputValue =''
          })
         console.log(res.data)
          if(this.activeName ==='many'){
              this.manyTableData = res.data
          }else {
              this.onlyTableData = res.data
          }
        },
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        addParams(){
            this.$refs.addFormRef.validate(async valid =>{
                if(!valid) return
              const{data :res} = await this.$http.post(`categories/${this.cateId}/attributes`,{
                    attr_name :this.addForm.attr_name,
                    attr_sel : this.activeName
                })

                if(res.meta.status !== 201){
                    return this.$message.error('添加参数失败！')
                }
                this.$message.success('添加参数成功')
                this.addDialogVisible = false
                this.getParamsData()
            })
        },
        async showEditDialog(attr_id){
          const{data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{params:{attr_sel : this.activeName}})
            if(res.meta.status !== 200){
                return this.$message.error('获取参数信息失败')
            }
            this.editForm =res.data
            this.editDialogVisible = true
        },
        // 重置修改的表单
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        editParams(){
            this.$refs.editFormRef.validate(async valid =>{
                if(!valid) return
                const{data :res} = await  this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{attr_name:this.editForm.attr_name,attr_sel:
                this.activeName})
                if(res.meta.status !== 200){
                    return this.$message.error('修改参数失败！')
                }
                this.$message.success('修改参数信息成功')
                this.getParamsData()
                this.addDialogVisible = false
            })
        },
        async removeParams(attr_id){
            const confirmResult =  await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err => err)

            if(confirmResult !== "confirm"){
                return this.$message.info('已取消删除！')
            }
            const {data: res} = await this.$http.delete(`categories/${this.cateid}/attributes//${attr_id}`)
                if(res.meta.status !== 200){
                    return this.$message.error('删除参数失败！')
                }

                this.$message.success('删除参数成功！')
                this.getParamsData()
            },
           async handleInputConfirm(row){
                if(row.inputValue.trim().length === 0){
                    row.inputValue = ""
                    row.inputVisible = false
                    return
                }
                row.attr_vals.push(row.inputValue.trim())
                row.inputValue = ""
                row.inputVisible = false
             this.saveAttrVals(row)

            },
            async saveAttrVals(row){
                 const{data :res}= await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
                    attr_name :row.attr_name,
                    attr_sel :row.attr_sel,
                    attr_vals : row.attr_vals.join(' ')
                })
                if(res.meta.status !== 200){
                    return this.$message.error('参数更新失败')
                }
                this.$message.success('修改参数成功')
            },

            showInput(row){
                row.inputVisible =true
                //让文本框获得焦点
                //eslint-disable-next-line
                this.$nextTick(_ => {
                this.$refs.saveTagInput.$refs.input.focus();
                })
            },
            async handleClose(i,row){
                row.attr_vals.splice(i,1)
                this.saveAttrVals(row)

            }

    },
    computed:{
        isBtnDisabled(){
            if(this.selectedCateKeys.length !== 3){
                return true
            }
            return false
        },
        cateId(){
            if(this.selectedCateKeys.length === 3) {
                return this.selectedCateKeys[2]
            }
            return null
        },
        titleText(){
            if(this.activeName ==='many'){
                return '动态参数'
            }
            return '静态属性'
        }

    }

}
</script>

<style lang="less" scoped>
.cat_opt {
    margin: 15px 0px;
}
.el-tag{
    margin: 10px
}
.input-new-tag{
    width: 120px
}
</style>

